linux-kernel - [linux-stable-rc:linux-5.10.y 7109/7120] arch/x86/kernel/cpu/bugs.c:57:21: warning: section attribute is specified on redeclared variable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 13 Jul 2022 04:07:25 +0800
From:   kernel test robot <lkp@...el.com>
To:     Josh Poimboeuf <jpoimboe@...nel.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Borislav Petkov <bp@...e.de>,
        Thadeu Lima de Souza Cascardo <cascardo@...onical.com>,
        Ben Hutchings <bwh@...nel.org>
Subject: [linux-stable-rc:linux-5.10.y 7109/7120]
 arch/x86/kernel/cpu/bugs.c:57:21: warning: section attribute is specified on
 redeclared variable

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.10.y
head:   ba398a0e54049bb6a1c102245ae84103f103ff2c
commit: 855b78ccf1c8c952e148bdbd234cde117b098060 [7109/7120] KVM: VMX: Prevent guest RSB poisoning attacks with eIBRS
config: i386-randconfig-a013 (https://download.01.org/0day-ci/archive/20220713/202207130344.AUqExE4E-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project badda4ac3c489a8c8cccdad1f74b9308c350a9e0)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=855b78ccf1c8c952e148bdbd234cde117b098060
        git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
        git fetch --no-tags linux-stable-rc linux-5.10.y
        git checkout 855b78ccf1c8c952e148bdbd234cde117b098060
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/kernel/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/cpu/bugs.c:57:21: warning: section attribute is specified on redeclared variable [-Wsection]
   DEFINE_PER_CPU(u64, x86_spec_ctrl_current);
                       ^
   arch/x86/include/asm/nospec-branch.h:278:12: note: previous declaration is here
   extern u64 x86_spec_ctrl_current;
              ^
   1 warning generated.


vim +57 arch/x86/kernel/cpu/bugs.c

c40221c4c496c5 Peter Zijlstra 2022-06-14  55  
c40221c4c496c5 Peter Zijlstra 2022-06-14  56  /* The current value of the SPEC_CTRL MSR with task-specific bits set */
c40221c4c496c5 Peter Zijlstra 2022-06-14 @57  DEFINE_PER_CPU(u64, x86_spec_ctrl_current);
c40221c4c496c5 Peter Zijlstra 2022-06-14  58  EXPORT_SYMBOL_GPL(x86_spec_ctrl_current);
c40221c4c496c5 Peter Zijlstra 2022-06-14  59  

:::::: The code at line 57 was first introduced by commit
:::::: c40221c4c496c5c026ede111094a96f292875d88 x86/bugs: Keep a per-CPU IA32_SPEC_CTRL value

:::::: TO: Peter Zijlstra <peterz@...radead.org>
:::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp